/*
 * ProGuard -- shrinking, optimization, obfuscation, and preverification of Java bytecode.
 *
 * Copyright (c) 2002-2018 GuardSquare NV
 *
 * This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public
 * License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later
 * version.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied
 * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License along with this program; if not, write to the Free
 * Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 */
package proguard.classfile.instruction.visitor;

import proguard.classfile.*;
import proguard.classfile.attribute.CodeAttribute;
import proguard.classfile.instruction.*;
import proguard.util.ArrayUtil;

/**
 * This InstructionVisitor delegates all visits to each InstructionVisitor in a given list.
 *
 * @author Eric Lafortune
 */
public class MultiInstructionVisitor implements InstructionVisitor {
    private InstructionVisitor[] instructionVisitors;
    private int instructionVisitorCount;

    public MultiInstructionVisitor() {
        this.instructionVisitors = new InstructionVisitor[16];
    }

    public MultiInstructionVisitor(InstructionVisitor... instructionVisitors) {
        this.instructionVisitors = instructionVisitors;
        this.instructionVisitorCount = instructionVisitors.length;
    }

    public void addInstructionVisitor(InstructionVisitor instructionVisitor) {
        instructionVisitors = ArrayUtil.add(instructionVisitors, instructionVisitorCount++, instructionVisitor);
    }

    // Implementations for InstructionVisitor.

    public void visitSimpleInstruction(Clazz clazz, Method method, CodeAttribute codeAttribute, int offset,
        SimpleInstruction simpleInstruction) {
        for (int index = 0; index < instructionVisitorCount; index++) {
            instructionVisitors[index].visitSimpleInstruction(clazz, method, codeAttribute, offset, simpleInstruction);
        }
    }

    public void visitVariableInstruction(Clazz clazz, Method method, CodeAttribute codeAttribute, int offset,
        VariableInstruction variableInstruction) {
        for (int index = 0; index < instructionVisitorCount; index++) {
            instructionVisitors[index].visitVariableInstruction(clazz, method, codeAttribute, offset,
                variableInstruction);
        }
    }

    public void visitConstantInstruction(Clazz clazz, Method method, CodeAttribute codeAttribute, int offset,
        ConstantInstruction constantInstruction) {
        for (int index = 0; index < instructionVisitorCount; index++) {
            instructionVisitors[index].visitConstantInstruction(clazz, method, codeAttribute, offset,
                constantInstruction);
        }
    }

    public void visitBranchInstruction(Clazz clazz, Method method, CodeAttribute codeAttribute, int offset,
        BranchInstruction branchInstruction) {
        for (int index = 0; index < instructionVisitorCount; index++) {
            instructionVisitors[index].visitBranchInstruction(clazz, method, codeAttribute, offset, branchInstruction);
        }
    }

    public void visitTableSwitchInstruction(Clazz clazz, Method method, CodeAttribute codeAttribute, int offset,
        TableSwitchInstruction tableSwitchInstruction) {
        for (int index = 0; index < instructionVisitorCount; index++) {
            instructionVisitors[index].visitTableSwitchInstruction(clazz, method, codeAttribute, offset,
                tableSwitchInstruction);
        }
    }

    public void visitLookUpSwitchInstruction(Clazz clazz, Method method, CodeAttribute codeAttribute, int offset,
        LookUpSwitchInstruction lookUpSwitchInstruction) {
        for (int index = 0; index < instructionVisitorCount; index++) {
            instructionVisitors[index].visitLookUpSwitchInstruction(clazz, method, codeAttribute, offset,
                lookUpSwitchInstruction);
        }
    }
}
